Printing-press attachment



G. K. SINCLAIR. PRINTING PRESS ATTACHMENT- APPLICATION man OCT. 8. 1921.

1,418,102, v Patented May 30,1922.

I IIII er orrie.

GEORGE K. SINCLAIR, OF LOUISVILLE, KENTUCKY.

PRINTING-PRESS ATTACHMENT.

Application filed October 8, 1921. Serial No. 506,415.

To all whom it may concern:

pressman to control the amount of ink to be applied to the face of the type in order that the impressions may be uniform. The attachment operates to control the pressure of the inking rollers against the type, and it may also be set to prevent the rollers from inking the type when the throw-off is applied.

In order that the invention may be better understood, reference is had to the accompanying drawing forming a' part of this specification, and in said drawing:

Figure 1 is a side elevation showing the application of the invention, and Figs. 2 and 3 are enlarged elevations of certain parts of the device detached from the press.

The invention is shown illustrated in conneotion with a Gordon press, but it can be applied to other types of presses with equal facility. It will also be understood that while the preferred embodiment of the invention has been disclosed, various changes and modifications may be made without a departure from the spirit and scope of the invention as claimed hereinafter.

In Fig. l of the drawing the reference numeral 5 denotes one side of the bed of a printing press which carries the type form, and the front edge 5, of which serves to guide the inking rollers across the form. One of the rollers is shown at 6, and at 7 is shown the back shaft of the press which operates in conjunction with. other wellknown elements, not necessary to describe here, to apply the throwofi in the usual manner for preventing an impression being taken when there is no paper in the press.

Along the edge 5 of the bed 5 which guides the inking rollers and parallel to said edge, is mounted a roller guide rail 8, which is slidably supported by-screws or similar fasteners 9 passing through slots in the rail and into the side of the bed. The fasteners 9 pass loosely through the slots 10, and the latter extend transversely of the rail 8, in view of which said rail may be shifted so as to project outwardly from the edge 5 its normal position being however flush with said edge.

To set the rail 8 in projecting position, a reciprocatory shifter bar 11 is provided, the same carrying projecting studs or pins 12 which seat in oblique slots 13 in the rail. The slots 13 run in such directions that when the bar is slid upwardly the rail 8 is advanced to project beyond the edge 5*, whereas a movement of the bar in the opposite direction retracts the rail to bring it back flush with the edge 5. The first-described movement of the shifter bar 11 is resisted by a spring 111 connected to its lower end and anchored to a bracket 15 carried by the bed 5. The bar 11 has vertical slots 16 through which pass screws or other suitable fasteners 17 threaded into the bed 5, and serving to support said bar for a vertical sliding movement.

To the lower end of the shifter bar 11 is connected one end of a lever 18 having connected to. its other end an upwardly extending pitman 19 to the upper end of which is connected a supporting link 20 which is pivoted to the bed 5, as shown at 21. The upper end of the pitman 19 is positioned beneath the back shaft 7 so that it may be 1n contact with a cam 22 on said shaft.

The lever 18 is pivoted intermediate its ends to the bed 5, as shown at 23, and its end to which is connected the pitman 19 is engaged by an adjusting screw 24 carried by the bed 5, the latter having a boss 25 through which the screw is threaded.

It will be evident from the foregoing that the rotation of the shaft 7 when the throwoif is applied, through the cam 22, the pitman 19, and the lever 18 will slide the shifter bar 11 upwardly to advance: the guide rail 8 beyond the edge 5, so that the. inking rollers are now held away from the form and prevented from inking the same. The rail 8 may also, by operating the screw 24, be set to project slightly beyond the edge 5 if it is found that the inking rollers are pressing too hard on the type, and in this way it is possible to obtain uniform impressions. When the rail 8 is set as just described the eccentric 22 operates as before to further advance the rail to keep the ink ing rollers off the type when the throw-off is applied.

The drawing illustrates only one side of the bed 5 and the attachment on this side, but it will be understood, of course, that the parts here shown are duplicated on the other side of the bed.

I claim:

1. The combination with the bed of a.

printing press and the back-shaft of the press; of guide rails positioned alongside and parallel to the inking roller guide edges of the bed, and normally flush with said edges, supports on the bed for said rails, reciprocatory shifter bars carried by the bed, connections between the bars and the rails for projecting the latter from the: guide edges, levers carried by the bed and connected to the shifter bars for operating the same, set screws carried by the bed and engageable with the levers, pitmen connected to the levers,'and means on the back-shaft for operating the levers.

2. The combination with the bed of a printing press and the back-shaft of the press; of guide rails positioned alongside and parallel to the inking roller guide edges of the bed, and normally flush with said edges, supports on the bed for said rails, reciprocatory shifter bars carried by the bed, connections between the bars and the rails for projecting the latter from the guide edges, levers carried by the bed and connected to the shifter bars for operating the same, set

screws carried by the bed and engageable with the levers, and operative connectionsbetween the levers and the back-shaft.

3. The combinationv with the bed of a printing press and the back-shaft of the press; of guide rails positioned alongside and parallel to the inking roller guide edges of the bed, and normally flush with said edges, supports on the bed for said rails, reciprocatory shifter-bars carried by the bed, connections between the bars and the rails for projecting the latter from the guide edges, levers carried by the bed and connected to the shifter bars for operating the same, pitmen connected to the levers, and means on the back-shaft "for operating the levers.

4. The combination with the bed of a printing press and the. back-shaft ofthe press; of guide rails positioned alongside and parallel'to theinking roller guide edges oi the bed, and normally flush with said edges, supports on the bed for said rails, reciprocatory shifter bars carried by the bed, connections between the bars and the rails for projecting the latter from the guide edges, levers carried by the bedand connected to the shifter bars for operating the same, and operative connections between the levers and the back-shaft.

In testimony whereofI' afiix my signature.

GEGRGE K. SINCLAIR. 

